I am told not to keep my valve cap on when my tank is partially full, but worried about my o ring, what’s the reason?

+2 votes
asked Mar 6, 2018 in Scuba Diving by Davidb (1,816 points)

3 Answers

+3 votes
answered Mar 8, 2018 by Corey (25 points)
After the cylinder has been used, many people leave the cap off to indicate that it has been used and it is not full. This eliminates anyone confusing it with a full cylinder
+3 votes
answered Mar 8, 2018 by Cvet (3,369 points)
That's because when you put the tank cap on it means it's full of air and ready to go. The O-ring on the tank should be changed ever so often any wsy. It a pinch remember and O-ring has two sides and can be flipped..
+1 vote
answered Mar 8, 2018 by George1224 (5,147 points)
leaving it off of a partially filled cylinder is a reminder that it need to be filled.

I have some tanks that I use to clean my pool and only use a small amount of air then. I leave the caps on them but check the gas supply when I gear up.
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